Circuit Lake

Electronic Project and Circuit Collection


PLL FM Transmitter with PIC-Based Tuning

March 01, 2011 By: admin Category: Ham Radio, Microcontroller, PIC, Project, Transmitter No Comments →

This easy to build PLL FM transmitter can deliver RF power output typically of 5 Watt. The project uses PIC16F627A to control PLL IC TSA5511 during FM Tuning process. PLL in-lock state status is displayed on LCD or you can check it on LED indicator (when LCD not connected).

FM Transmitter with a Single Transistor

February 04, 2011 By: admin Category: Analog, Ham Radio, Transmitter No Comments →

Here is the most stable, smallest, and energy saving FM transmitter. It uses only single transistor oscillator, PN2222A. Other high frequency / low noise transistor like 2N2222A, BFxxx series, BC109B, C, and even well known BC238 could work as well. Key to a well functioning, low consumption circuit is to use a high hFE / […]

Remote Accelerometer

January 11, 2011 By: admin Category: Arduino, Data Acquisition, Microcontroller, Project, Remote, Sensor, Transmitter, Wireless No Comments →

Remote accelerometer is small device that has a three axis accelerometer and transmit the acceleration values to a remote host. One example of its use is to gather a data from moving object. You can attach the sensor to someone and when he move like jump around, you can use the data to produce sound […]

FM Wireless Microphone

October 12, 2009 By: admin Category: Analog, Transmitter, Wireless No Comments →

This FM Wireless Microphone project has good frequency stability and has range over 1 Km (under good conditions). This project features RF amplifier buffer (10dB gain), an AF preamplifier to boost the modulation and good microphone sensitivity. You can use it for guitars and remote control system. This project quite simple to build. The two […]